using System; using System.Runtime.InteropServices; namespace CUETools.Codecs.libFLAC { internal unsafe static class FLACDLL { internal const string DllName = "libFLAC_dynamic"; internal const CallingConvention libFLACCallingConvention = CallingConvention.Cdecl; internal const int FLAC__MAX_CHANNELS = 8; private static string version; internal static string GetVersion => version; [DllImport("kernel32.dll")] private static extern IntPtr LoadLibrary(string dllToLoad); [DllImport("kernel32.dll")] public static extern IntPtr GetProcAddress(IntPtr hModule, string procedureName); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamDecoderReadStatus FLAC__StreamDecoderReadCallback(IntPtr decoder, byte* buffer, ref long bytes, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamDecoderSeekStatus FLAC__StreamDecoderSeekCallback(IntPtr decoder, long absolute_byte_offset, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamDecoderTellStatus FLAC__StreamDecoderTellCallback(IntPtr decoder, out long absolute_byte_offset, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamDecoderLengthStatus FLAC__StreamDecoderLengthCallback(IntPtr decoder, out long stream_length, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate int FLAC__StreamDecoderEofCallback(IntPtr decoder, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamDecoderWriteStatus FLAC__StreamDecoderWriteCallback(IntPtr decoder, FLAC__Frame* frame, int** buffer, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate void FLAC__StreamDecoderMetadataCallback(IntPtr decoder, FLAC__StreamMetadata* metadata, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate void FLAC__StreamDecoderErrorCallback(IntPtr decoder, FLAC__StreamDecoderErrorStatus status, void* client_data); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern IntPtr FLAC__stream_decoder_new(); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_decoder_set_metadata_respond(IntPtr decoder, FLAC__MetadataType type); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_decoder_process_until_end_of_metadata(IntPtr decoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_stream( IntPtr decoder, FLAC__StreamDecoderReadCallback read_callback, FLAC__StreamDecoderSeekCallback seek_callback, FLAC__StreamDecoderTellCallback tell_callback, FLAC__StreamDecoderLengthCallback length_callback, FLAC__StreamDecoderEofCallback eof_callback, FLAC__StreamDecoderWriteCallback write_callback, FLAC__StreamDecoderMetadataCallback metadata_callback, FLAC__StreamDecoderErrorCallback error_callback, void* client_data ); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_decoder_finish(IntPtr decoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_decoder_delete(IntPtr decoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_decoder_seek_absolute(IntPtr decoder, long sample); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern FLAC__StreamDecoderState FLAC__stream_decoder_get_state(IntPtr decoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_decoder_process_single(IntPtr decoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern IntPtr FLAC__stream_encoder_new(); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_bits_per_sample(IntPtr encoder, uint value); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_sample_rate(IntPtr encoder, uint value); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_channels(IntPtr encoder, uint value); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_finish(IntPtr encoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_delete(IntPtr encoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_process_interleaved(IntPtr encoder, int* buffer, int samples); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern FLAC__StreamEncoderState FLAC__stream_encoder_get_state(IntPtr encoder); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern void FLAC__stream_encoder_get_verify_decoder_error_stats(IntPtr encoder, out ulong absolute_sample, out uint frame_number, out uint channel, out uint sample, out int expected, out int got); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern FLAC__StreamMetadata* FLAC__metadata_object_new(FLAC__MetadataType type); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__metadata_object_seektable_template_append_spaced_points_by_samples(FLAC__StreamMetadata* metadata, int samples, long total_samples); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__metadata_object_seektable_template_sort(FLAC__StreamMetadata* metadata, int compact); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_metadata(IntPtr encoder, FLAC__StreamMetadata** metadata, int num_blocks); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_verify(IntPtr encoder, int value); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_do_md5(IntPtr encoder, int value); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_total_samples_estimate(IntPtr encoder, long value); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_compression_level(IntPtr encoder, int value); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern int FLAC__stream_encoder_set_blocksize(IntPtr encoder, int value); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamEncoderWriteStatus FLAC__StreamEncoderWriteCallback(IntPtr encoder, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] byte[] buffer, long bytes, int samples, int current_frame, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamEncoderSeekStatus FLAC__StreamEncoderSeekCallback(IntPtr encoder, long absolute_byte_offset, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate FLAC__StreamEncoderTellStatus FLAC__StreamEncoderTellCallback(IntPtr encoder, out long absolute_byte_offset, void* client_data); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] internal delegate void FLAC__StreamEncoderMetadataCallback(IntPtr encoder, FLAC__StreamMetadata* metadata, void* client_data); [DllImport(DllName, CallingConvention = libFLACCallingConvention)] internal static extern FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_stream(IntPtr encoder, FLAC__StreamEncoderWriteCallback write_callback, FLAC__StreamEncoderSeekCallback seek_callback, FLAC__StreamEncoderTellCallback tell_callback, FLAC__StreamEncoderMetadataCallback metadata_callback, void* client_data); static FLACDLL() { var myPath = new Uri(typeof(FLACDLL).Assembly.CodeBase).LocalPath; var myFolder = System.IO.Path.GetDirectoryName(myPath); var is64 = IntPtr.Size == 8; var subfolder = is64 ? "x64" : "win32"; #if NET40 IntPtr Dll = LoadLibrary(System.IO.Path.Combine(myFolder, subfolder, DllName + ".dll")); #else IntPtr Dll = LoadLibrary(System.IO.Path.Combine(System.IO.Path.Combine(myFolder, subfolder), DllName + ".dll")); #endif if (Dll == IntPtr.Zero) Dll = LoadLibrary(DllName + ".dll"); if (Dll == IntPtr.Zero) throw new DllNotFoundException(); IntPtr addr = GetProcAddress(Dll, "FLAC__VERSION_STRING"); IntPtr ptr = Marshal.ReadIntPtr(addr); version = Marshal.PtrToStringAnsi(ptr); } }; }